4.14-stable review patch. If anyone has any objections, please let me know.
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From: Abhijeet Kumar abhijeet.kumar@intel.com
[ Upstream commit d070f7c703ef26e3db613f24206823f916272fc6 ]
In skylake platform, we hear a loud pop noise(0 dB) at start of audio capture power up sequence. This patch removes the pop noise from the recording by adding a delay before enabling ADC.
Signed-off-by: Abhijeet Kumar abhijeet.kumar@intel.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/codecs/nau8825.c | 1 + 1 file changed, 1 insertion(+)
--- a/sound/soc/codecs/nau8825.c +++ b/sound/soc/codecs/nau8825.c @@ -905,6 +905,7 @@ static int nau8825_adc_event(struct snd_
switch (event) { case SND_SOC_DAPM_POST_PMU: + msleep(125); regmap_update_bits(nau8825->regmap, NAU8825_REG_ENA_CTRL, NAU8825_ENABLE_ADC, NAU8825_ENABLE_ADC); break;